starrett-webber gage blocks
Transcription
starrett-webber gage blocks
STARRETT-WEBBER GAGE BLOCKS STARRETT-WEBBER GAGE BLOCKS Precision Gage Blocks, Standard Reference Bars, Angle Gage Blocks, True Squares, Optical Polygons and Targets The first part of this section is devoted to GAGE BLOCKS and STANDARD REFERENCE BARS. Gage Blocks – Major Product Characteristics Precision gage blocks are the primary standards vital to dimensional quality control in the manufacture of parts. The four major characteristics that are necessary for a precision gage block are accuracy, surface finish, wear resistance and dimensional stability. Other factors are corrosion resistance, hardness, thermal conductivity and coefficient of expansion. The base material used for gage blocks is crucial in meeting the above criteria. While many materials have been tried, the major types available today are: ◆ Traditional high-grade steel gage blocks, which are generally used in shop floor environments ◆ Tungsten Carbide gage blocks, which have the advantage of being harder and longer wearing than steel. (Not available from Webber.) ◆ Ceramic gage blocks have an advantage over regular steel. They will outwear regular steel and they will not corrode ◆ Chromium Carbide gage blocks are considered the top of the line – the finest available. They outwear regular steel and ceramic. In addition, they will not corrode and are very stable and accurate, and have exceptional “wringing” qualities croblox® Chromium Carbide – the superior gage block material. The reason that our Webber Gage Division emphasizes gage blocks made from Chromium Carbide is because they are the most stable measuring devices ever developed. No one in the world except Starrett/Webber has produced the accuracy and stability of our croblox® Grand Masters. They were produced in 1955 of Chromium Carbide material to an accuracy within one millionth of an inch (.0000254mm) and have been checked periodically by the U.S. National Bureau of Standards and the U.S. National Institute of Standards and Technology (NIST) and have remained stable over this period. 446 Other Characteristics Accuracy All Starrett/Webber gage blocks meet or exceed all known specifications. The flatness, parallelism and surface finish necessary to achieve the required accuracies are the same as or better than government requirements. Stability Starrett/Webber gage blocks do not change in size except through normal wear. Gage block stability is a characteristic that our Webber Gage Division has mastered with over seventy years of experience. Our gage blocks have withstood the test of time. Hardness Steel blocks have a Rockwell “C” hardness of approximately 64-65. Chromium Carbide blocks have a Rockwell “C” hardness of 71-73, with an unusually fine, hard grain structure which gives them exceptional resistance to wear and abrasion. Thermal Conductivity and Coefficient of Expansion These are not important considerations when measurements are taken in temperature-controlled environments. This is primarily done when measuring to microinches or microns. On the shop floor, where precision measurements are rarely finer than .0002⬙ or 0.005mm, the coefficient of expansion of steel, chromium carbide and ceramics is so close as to be negligible. Thermal conductivity is important on the shop floor. However, because it takes time for a gage block to move to the same temperature as the work piece, we recommend setting the gage block on a heat sink such as a large mass of metal that is at the shop environment temperature. STARRETT-WEBBER GAGE BLOCKS National Institute of Standards and Technology National Voluntary Laboratory Accreditation Program CALIBRATION LABORATORIES NVLAP LAB CODE 200038-0 WEBBER GAGE DIVISION / L.S. STARRETT CO. 24500 Detroit Road Cleveland, OH 44145 Phone: 440-835-0001 Fax: 440-892-9555 DIMENSIONAL NVLAP Code: 20/DO3 Gage Blocks How To Order Starrett Precision Gage Blocks Gage Block Sets Individual Gage Blocks 1. Order by catalog number. 1. Specify Shape, signified on the page by the following symbols: 2. Please specify if you require a Commercial Grade Calibration or Master Grade Calibration. See the catalog page regarding our Accreditied Gage Block Calibration Service near the end of this section. A certificate of calibration provides individual readings on each block and provides traceability to NIST. Webber gage block calibrations are NVLAP® accredited by NIST. (We need the end user’s name and address to place on the certificate.) 3. Specify if you require etched serial numbers. We can provide numbers up to a 6-digit maximum. (Our standard practice is to put the same etch number on each block in a set. Blocks are differentiated by their marked size.) The buyer of Webber products listed in this catalog agrees to the 100% Relaxed Acceptance Rule contained in ASME B89.7.3.1 (Guidelines for Decision Rules: Considering Measurement Uncertainty in Determining Conformance to Specifications.) Products may not be rejected by the purchaser unless his measurements exceed the published tolerances by more than his uncertainty of measurement. NVLAP® accreditation does not constitute an endorsement of any product by NVLAP® or any agency of the U.S. government. ◆ Rectangular ◆ Square ◆ Heavy Duty • • • 2. Specify Material (croblox®, steel, or ceramic) 3. Specify Unit of Measure (inch or metric) 4. Specify the Size 5. Specify Special Lengths, if applicable (Rectangular Only) • Thin block sets (28 pc. inch and 17 pc. metric) are all 1.115⬙ (28.3mm) long. Specify “SS” length • .050⬙, .100⬙, and .150⬙ blocks in inch 81-92 pc. sets are 1.380 long. Specify the Long length, “L” • .100⬙ blocks contained in the 36, 38, and 43 pc. sets are 1.380⬙ long. Specify the Long length, “L” 6. Specify Accuracy Grade (see next page) 7. Please specify if you require a Commercial Grade Calibration or Master Grade Calibration. See the catalog page regarding our Accreditied Gage Block Calibration Service near the end of this section. A certificate of calibration provides individual readings on each block and provides traceability to NIST. Webber gage block calibrations are NVLAP® accredited by NIST. (We need the end user’s name and address to place on the certificate.) 8. Specify if you require etched serial numbers. We can provide numbers up to a 6-digit maximum. 447 STARRETT- WEBBER GAGE BLOCKS Gage Block Tolerances: B89.1.9 Inch System: Tolerances expressed in microinches (.000001⬙) 1 millionth of an inch Order Webber Grade AA B89.1.9 Grade 00 Order Webber Grade LM Thru .050⬙ Thru .400⬙ Thru 1⬙ Thru 2⬙ Thru 3⬙ Thru 4⬙ Thru 5⬙ Size Tolerance Variation in Length Tolerance Flatness Tolerance Size Tolerance Variation in Length Tolerance Flatness Tolerance Size Tolerance Variation in Length Tolerance Flatness Tolerance +1.2/-1.2 +1.2/-1.2 +1.2/-1.2 +2.0/-2.0 +3.0/-3.0 +4.0/-4.0 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 +4/-4 +3/-3 +3/-3 +4/-4 +5/-5 +6/-6 +8/-8 2 2 2 2 3 3 3 2 2 2 2 Rect.: 2, Sq.: 3 Rect.: 2, Sq.: 3 Rect.: 2, Sq.: 3 +6/-6 +5/-5 +6/-6 +8/-8 +10/-10 +12/-12 +16/-16 4 4 4 4 4 5 5 4 4 4 4 4 4 4 +8/-8 +10/-10 +10/-10 +12/-12 +14/-14 +18/-18 +20/-20 3 4 4 4 4 5 6 Rect.: 2, Sq.: 3 4 4 4 4 4 4 +16/-16 +20/-20 +20/-20 +24/-24 +28/-28 +36/-36 +44/-44 5 6 6 6 7 8 10 4 6 6 6 6 6 6 Thru 6⬙ Thru 7⬙ Thru 8⬙ Thru 10⬙ Thru 12⬙ Thru 16⬙ Thru 20⬙ Not Available from Webber B89.1.9 Grade AS1 Thru .050⬙ Thru .400⬙ Thru 1⬙ Thru 2⬙ Thru 3⬙ Thru 4⬙ Thru 5⬙ Thru 6⬙ Thru 7⬙ Thru 8⬙ Thru 10⬙ Thru 12⬙ Thru 16⬙ Thru 20⬙ Not Available from Webber B89.1.9 Grade AS2 Size Tolerance Variation in Length Tolerance Flatness Tolerance Size Tolerance Variation in Length Tolerance Flatness Tolerance +12/-12 +8/-8 +12/-12 +16/-16 +20/-20 +24/-24 +32/-32 +32/-32 +40/-40 +40/-40 +48/-48 +56/-56 +72/-72 +88/-88 6 6 6 6 6 8 8 8 10 10 10 10 12 14 6 6 6 6 6 6 6 6 7 7 7 7 7 7 +24/-24 +18/-18 +24/-24 +32/-32 +40/-40 +48/-48 +64/-64 +64/-64 +80/-80 +80/-80 +104/-104 +112/-112 +144/-144 +176/-176 12 12 12 12 14 14 16 16 16 16 18 20 20 24 10 10 10 10 10 10 10 10 10 10 10 10 10 10 ◆ B89.1.9 Grade 00 exceeds DIN, ISO, BS Grades K 448 Order Webber Grade A1 B89.1.9 Grade 0 Suggested Replacement Grades for GGG-G-15C GGG-G-15C Webber B89.1.9 Grade Grade Grade 0.5 LM — 1 AA 00 2 A1 0 3 A AS1 NOTE: The above replacement grades are suggested in B89.1.9. However, the tolerances specified in GGG-G-15C and B89.1.9 are not exactly the same. Gage blocks meeting B89.1.9 specifications may not meet GGG-G-15C requirements and vice versa. MATERIAL COEFFICIENTS OF THERMAL EXPANSION ARE: Chromium Carbide 4.7 x 10-6 inch/ºF per inch SAE 52100 Steel 6.4 x 10-6 inch/ºF per inch Ceramic 5.5 x 10-6 inch/ºF per inch STARRETT-WEBBER GAGE BLOCKS Gage Block Tolerances: B89.1.9 Metric System: Tolerances expressed in micrometers (0.001mm) Order Webber Grade AA B89.1.9 Grade 00 Order Webber Grade LM Thru 0.5mm Thru 10mm Thru 25mm Thru 50mm Thru 75mm Thru 100mm Thru 125mm Size Tolerance Variation in Length Tolerance Flatness Tolerance Size Tolerance Variation in Length Flatness Tolerance Tolerance Size Tolerance Variation in Length Tolerance Flatness Tolerance +.03/-.03 +.03/-.03 +.04/-.04 +.05/-.05 +.08/-.08 +.10/-.10 .03 .03 .03 .03 .03 .03 .03 .03 .03 .03 .03 .03 +.10/-.10 +.07/-.07 +.07/-.07 +.10/-.10 +.12/-.12 +.15/-.15 +.20/-.20 .05 .05 .05 .06 .07 .07 .08 .05 .05 .05 .05 Rect (.05), Sq. (.07) Rect (.05), Sq. (.07) Rect (.05), Sq. (.07) +.14/-.14 +.12/-.12 +.14/-.14 +.20/-.20 +.25/-.25 +.30/-.30 +.40/-.40 .10 .10 .10 .10 .12 .12 .14 .10 .10 .10 .10 .10 .10 .10 +.20/-.20 +.25/-.25 +.25/-.25 +.30/-.30 +.35/-.35 +.45/-.45 +.50/-.50 .08 .09 .09 .10 .10 .12 .14 Rect (.05), Sq. (.07) .10 .10 .10 .10 .10 .10 +.40/-.40 +.50/-.50 +.50/-.50 +.60/-.60 +.70/-.70 +.90/-.90 +1.1/-1.1 .14 .16 .16 .16 .18 .20 .25 .10 .15 .15 .15 .15 .15 .15 Thru 150mm Thru 175mm Thru 200mm Thru 250mm Thru 300mm Thru 400mm Thru 500mm Not Available from Webber B89.1.9 Grade AS1 Thru 0.5mm Thru 10mm Thru 25mm Thru 50mm Thru 75mm Thru 100mm Thru 125mm Thru 150mm Thru 175mm Thru 200mm Thru 250mm Thru 300mm Thru 400mm Thru 500mm Order Webber Grade A1 B89.1.9 Grade 0 Not Available from Webber B89.1.9 Grade AS2 Size Tolerance Variation in Length Tolerance Flatness Tolerance Size Tolerance Variation in Length Tolerance Flatness Tolerance +.30/-.30 +.20/-.20 +.30/-.30 +.40/-.40 +.50/-.50 +.60/-.60 +.80/-.80 +.80/-.80 +1.0/-1.0 +1.0/-1.0 +1.2/-1.2 +1.4/-1.4 +1.8/-1.8 +2.2/-2.2 .16 .16 .16 .18 .18 .20 .20 .20 .25 .25 .25 .25 .30 .35 .15 .15 .15 .15 .15 .15 .15 .15 .18 .18 .18 .18 .18 .18 +.60/-.60 +.45/-.45 +.60/-.60 +.80/-.80 +1.0/-1.0 +1.2/-1.2 +1.6/-1.6 +1.6/-1.6 +2.0/-2.0 +2.0/-2.0 +2.4/-2.4 +2.8/-2.8 +3.6/-3.6 +4.4/-4.4 .30 .30 .30 .30 .35 .35 .40 .40 .40 .40 .45 .50 .50 .60 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 ◆ B89.1.9 Grade 00 exceeds DIN, ISO, BS Grades K Suggested Replacement Grades for GGG-G-15C GGG-G-15C Webber B89.1.9 Grade Grade Grade 0.5 LM — 1 AA 00 2 A1 0 3 A AS1 NOTE: The above replacement grades are suggested in B89.1.9. However, the tolerances specified in GGG-G-15C and B89.1.9 are not exactly the same. Gage blocks meeting B89.1.9 specifications may not meet GGG-G-15C requirements and vice versa. MATERIAL COEFFICIENTS OF THERMAL EXPANSION ARE: Chromium Carbide 8.5 x 10-6 m/ºC per m SAE 52100 Steel 11.5 x 10-6 m/ºC per m Ceramic 9.9 x 10-6 m/ºC per m 449 STARRETT-WEBBER GAGE BLOCKS All sets are furnished in a handsome, rugged wood case for lasting protection. Inch System Gage Block Sets, Individual Blocks and Accessories The following pages include these Inch System items in the order shown: Rectangular gage blocks and accessories • 450 • Square gage blocks and accessories • Heavy-duty gage blocks and accessories STARRETT-WEBBER GAGE BLOCKS Rectangular croblox® – Inch System Gage Block Sets in Case Accuracy Grade* B89.1.9 0 Measuring Range Blocks Per Set B89.1.9 00 .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 81 Webber LM B89.1.9 0 B89.1.9 00 Webber LM .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .000025 1/16-12.000 in Steps of 1/64 88 B89.1.9 0 B89.1.9 00 .200-8.000 in Steps of .001 .300-8.000 in Steps of .0001 34 Webber LM B89.1.9 0 B89.1.9 00 .020-.240 in Steps of .001 .040-.240 in Steps of .0001 .060-.240 in Steps of .00005 28 Inch Blocks Included In Sets 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) Same as in RC 81. Set, Plus 3 Blocks .100025, .10005, .100075 4 Blocks 1/16, 5/64, 3/32, 7/64 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 3 Blocks .100 Through .300 (Steps of .100) 1 Block .500 3 Blocks 1.000, 2.000 and 4.000 1 Block .02005 9 Blocks .0201 Through .0209 (Steps of .0001) 9 Blocks .021 Through .029 (Steps of .001) 9 Blocks .010 Through .090 (Steps of .010) Catalog No. RC 81.A1 RC 81.AA RC 81.LM RC 88.A1 RC 88.AA RC 88.LM RC 34.A1 RC 34.AA RC 34.LM RC 28.A1 RC 28.AA NOTES: For gage block accessories, order AC 11.A Accessory Set in Case. Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 451 STARRETT-WEBBER GAGE BLOCKS Rectangular Ceramic – Inch System Gage Block Sets in Case Inch Our Ceramic Gage Blocks, offered in rectangular, inch and metric, fill the gap between steel and the universally accepted croblox®. While not as stable as croblox®, ceramic is an excellent alternative to steel because of its superior hardness, thermal expansion and wear characteristics. Set No. RY 34.A1. Accuracy Grade* B89.1.9 0 B89.1.9 00 B89.1.9 0 B89.1.9 00 Measuring Range Blocks Per Set .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 81 .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .000025 1/16-12.000 in Steps of 1/64 88 B89.1.9 0 .200-8.000 in Steps of .001 .300-8.000 in Steps of .0001 B89.1.9 00 34 Blocks Included In Sets Catalog No. 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) RY 81.A1 Same as in RY 81. Set, Plus 3 Blocks .100025, .10005, .100075 4 Blocks 1/16, 5/64, 3/32, 7/64 RY 88.A1 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 3 Blocks .100 Through .300 (Steps of .100) 1 Block .500 3 Blocks 1.000, 2.000 and 4.000 RY 81.AA RY 88.AA RY 34.A1 RY 34.AA NOTE: Sets include etched serial number and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 452 STARRETT-WEBBER GAGE BLOCKS Rectangular Steel – Inch System Gage Block Sets in Case Measuring Range Blocks Per Set .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 81 .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .000025 1/16-12.000 in Steps of 1/64 .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .000025 1/16-12.000 in Steps of 1/64 B89.1.9 Accuracy Grade 0* Blocks Included In Sets 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) Inch Catalog No. RS 81.A1 88 Same as in RS 81.A1 Set, Plus 3 Blocks .100025, .10005, .100075 4 Blocks 1/16, 5/64, 3/32, 7/64 RS 88.A1 92 Same as in RS 88.A1 Set, Plus 2 Blocks .100⬙ (croblox® Wear Blocks) 2 Blocks .050 (croblox® Wear Blocks) RS 92.A1 .100-4.000 in Steps of .001 .150-4.000 in Steps of .0001 .200-4.000 in Steps of .00005 38 .200-8.000 in Steps of .001 .300-8.000 in Steps of .0001 34 .020-.240 in Steps of .001 .040-.240 in Steps of .0001 .060-.240 in Steps of .00005 28 .0625-4.000 in Steps of .0625 .100-4.000 in Steps of .100 9 2 Blocks .050 (croblox® Wear Blocks) 1 Block .05005 9 Blocks .0501 Through .0509 (Steps of .0001) 9 Blocks .051 Through .059 (Steps of .001) 11 Blocks .050 Through .150 (Steps of .010) 4 Blocks .200 Through .500 (Steps of .100) 2 Blocks 1.000 and 2.000 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 4 Blocks .100, .200, .300, .500 3 Blocks 1.000, 2.000, 4.000 1 Block .02005 9 Blocks .0201 Through .0209 (Steps of .0001) 9 Blocks .021 Through .029 (Steps of .001) 9 Blocks .010 Through .090 (Steps of .010) 1 Block .0625, .100, .125, .200, .250, .300, .500, 1.000, 2.000 10 B89.1.9 Accuracy Grade AS1* 10 blocks .105, .210, .315, .420, .500, .605, .710, .815, .920, 1.000 Micrometer Checking Set RS 38.A1 RS 34.A1 RS 28.A1 RS 9.A1 RS 10.A NOTES: For gage block accessories, order AC 11.A Accessory Set in Case. See rectangular block accessories on the next page. Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 453 STARRETT-WEBBER GAGE BLOCKS MicroAccurate® – B-Grade Gage Block Sets In Case Inch & Metric These B-Grade gage block sets are Starrett Global products. Their very affordable price makes them ideal for general shop floor use. Now, our initial Inch Sets are joined by four Metric B-Grade Sets. Etched, unique serial numbers are included on each block. Custom numbers are not available. Sets are available with a choice of two types of certificates of calibration as described below. Inch System sets have a tolerance of ±50 in. Metric System sets have a tolerance of ±1.25 m. No. RS 81.B Gage Block Sets NEW Measuring Range Inch System Sets .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 Metric System Sets 3.0 Through 450 in .0005mm Steps 2.0 Through 450 in .001mm Steps 1.0 Through 450 in .01mm Steps 1.0 Through 450 in .1mm Steps Metric System Sets 3.0 Through 250 in .0005mm Steps 2.0 Through 250 in .001mm Steps 1.0 Through 250 in .01 mm Steps 1.0 Through 250 in .1mm Steps Blocks Per Set 81 88 112 Blocks Included In Sets 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) 1 block .5mm 1 block 1.0005mm 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 blocks 1.01mm Through 1.49mm (Steps of .01mm) 18 blocks 1mm Through 9.5mm (Steps of .5mm) 10 blocks 10mm Through 100mm (Steps of 10mm) 1 block .5mm 1 block 1.0005mm 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 blocks 1.01mm Through 1.49mm (Steps of .01mm) 48 blocks 1mm Through 24.5mm (Steps of .5mm) 4 blocks 25mm Through 100mm (Steps of 25mm) Catalog No. RS 81.B RS 81.W RS 88.MW RS 88.MB RS 112.MW RS 112.MB Specifications Catalog No. Features RS 81.B Calibration performed at Webber Gage in Cleveland, OH. Certificate of Calibration with NVLAP accreditation. Calibration in accordance with ISO 17025 with dated calibration certificate and NIST traceability number. The name and address of the RS 88.MB user may be added to the calibration certificate. RS 112.MB Inch System (RS 81.B) uncertainty of measurement (k=2): = 6 + L where L is in inches, but not less than 7 in. Metric Systems (RS 88.MB & RS 112.MB) uncertainty of measurement (k=2): = 0.15 + .001L where L is in millimeters, but not less than 0.18 m. RS 81.W Calibration performed in China in partnership with Webber Gage. Webber Gage samples the measurements to monitor the calibration results. Calibrations are traceable to NIST, but no NIST traceability number or dates will be given. The name RS 88.MW and addrress of the user will be left blank on the calibration certificate. RS 112.MW Inch System (RS 81.W) uncertainty of measurement (k=2): 10 in. Metric Systems (RS 88.MW & RS 112.MW) uncertainty of measurement (k=2): = 0.25 m. 454 STARRETT-WEBBER GAGE BLOCKS Rectangular Gage Block Accessories Steel and croblox® – Inch System Inch Rectangular Steel and croblox® Accessories Individually or Sets as stated below Individual Accessories Rectangular croblox® Wear Blocks Size .020 .050 .100 Catalog No. RC .020 WA1 RC .050 WA1 RC .100 WA1 ** croblox® jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. Description Half-Round Jaw** .250 Radius Straight Jaw** .250 Thick Clamps 0–1-1/2 Capacity 1-1/2–4 Capacity 4–6-1/2 Capacity 0-12 Capacity Scriber Point Center Point, 100 C/L Base Block 1 Thick Case (CS 9111.) Catalog No. Steel croblox® No. of Steel Accessories Included 81- 92 Block Sets when ord. Set No. AC 11.A w/ Acces. RA 1. 2 2 2* 2* 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 RA 4. RA 24. RA 5. RA 6. RA 7. RA 8. RA 11. RA 12. RA 13. Additional Accessories Clamps 0-18 Capacity RA 9. 0-24 Capacity RA 10. 0-36 Capacity RA 14. Half-Round Jaws .200 Radius RA 2. .100 Radius RA 3. Square croblox® – Inch System GageBlock Sets in Case Accuracy Grade* B89.1.9 0 B89.1.9 00 B89.1.9 0 B89.1.9 00 B89.1.9 0 B89.1.9 00 Measuring Range Blocks Per Set .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 81 .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .000025 1/16-12.000 in Steps of 1/64 88 .200-8.000 in Steps of .001 .300-8.000 in Steps of .0001 36 Inch Blocks Included In Sets 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1) Catalog No. Same as in SC 81. Set, Plus 3 Blocks .100025, .10005, .100075 4 Blocks 1/16, 5/64, 3/32, 7/64 SC 88.A1 1 Block .050 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 5 Blocks .100 Through .500 (Steps of .100) 3 Blocks 1.000, 2.000, 4.000 • SC 81.A1 SC 81.AA SC 88.AA SC 36.A1 SC 36.AA NOTES: All Square croblox® sets above are available with accessories at extra cost. To order, add “X” to catalog number. Accessories are furnished in steel (see following pages). Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 455 STARRETT-WEBBER GAGE BLOCKS Square Steel – Inch System Gage Block Sets in Case Measuring Range Blocks Per Set .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 81 .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .000025 1/16-12.000 in Steps of 1/64 88 .200-8.000 in Steps of .001 .300-8.000 in Steps of .0001 36 .020-.240 in Steps of .001 .040-.240 in Steps of .0001 .060-.240 in Steps of .00005 28 5.000-84 in Steps of 1.000 8 5.000-84 in Steps of 1.000 8 Inch Blocks Included In Sets 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) Above Set also Available with ACCESSORIES** (Extra) Same as in SS 81.A1 Set, Plus 3 Blocks .100025, .10005, .100075 4 Blocks 1/16, 5/64, 3/32, 7/64 Above Set also Available with ACCESSORIES** (Extra) 1 Block .050 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 5 Blocks .100 Through .500 (Steps of .100) 3 Blocks 1.000, 2.000 and 4.000 Above Set Also Available with ACCESSORIES** (Extra) 1 Block .02005 9 Blocks .0201 Through .0209 (Steps of .0001) 9 Blocks .021 Through .029 (Steps of .001) 9 Blocks .010 Through .090 (Steps of .010) 8 Blocks 5, 6, 7, 8, 10, 12, 16, 20 Accessories Included: 6 Each SA 8. Studs 2 Each SA 9. Flat Head Screws (long) 2 Each SA 10. Flat Head Screws (short) 1 Each SA 16. 4 1/2 - 6⬙ Tie Rod (adjustable) 1 Each SA 17. 6 - 9⬙ Tie Rod (adjustable) 1 Each SA 18. 11 3/4⬙ Tie Rod 1 Each SA 19. 15 3/4⬙ Tie Rod 2 Each SA 20. 19 3/4⬙ Tie Rods Catalog No. B89.1.9 Accuracy Grade 00* Same as above SS 8.A1X SS 81.A1 SS 88.A1 SS 36.A1 SS 28.A1 SS 8.A1X SS 8.AAX NOTES: ** All square steel sets 34 through 88 are available with accessories at extra cost. To order, add “X” to catalog number. Accessories are steel. See square block accessories on the next page. Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 456 • B89.1.9 Accuracy Grade 0* STARRETT-WEBBER GAGE BLOCKS Internal Measuring Machine Jaws No. SA 708. croblox® No. SA 707. Steel Square Gage Block Accessories Steel and croblox® – Inch System • Jaws are doubled-ended, self-proving, assuring parallelism and squareness. Designed for use with square style gage blocks. Jaws are made of long-wearing croblox® or steel material, 2.000 long, 1.000 wide and .500 thick. Both side edges are lapped 90º square to the gaging faces within 30 seconds of arc and extend beyond the gage blocks in the combination, thus forming a square master. Jaw and gage combination parallelism is quickly checked merely by turning the combination to the opposite side and rechecking the reading. Furnished in pairs. No. SA 25.A. Square Steel and croblox® Accessories Individually or sets as stated below Individual Accessories Square croblox® Wear Blocks Size .100 With 1 Side Countersunk Catalog No. SC .100 WA1 Additional Accessories Catalog No. Description Steel * croblox® Tie Rods 11-3/4 Solid SA 18. 15-3/4 Solid SA 19. 19-3/4 Solid SA 20. Description Half-Round Jaw** .125 Radius .250 Radius Straight Jaw** .500 Thick Scriber Point Center Point, .100 C/L Base Block .500 Thick Knurled Screw Stud Flat Head Screw Long Short Slotted Nut Tie Rods 3/4 Solid 1-1/2 Solid 2-1/4 Solid 3 Solid 4-1/2-6 Adjust 6-9 Adjust Case (CS9168) Catalog No. Steel croblox® No. of Steel Accessories Included Set No. SA 25.A and 81 thru 88 Block 34 and 36 Block Sets when ordered Sets when ordered with Accessories with Accessories SA 1. SA 2. 2 2 SA 3. SA 4. SA 5. SA 6. SA 7. SA 8. SA 23. 2* 1 1 1 2 2 2 1 2 2 SA 9. SA 10. SA 11. 2 2 2 2 2 2 SA 12. SA 13. SA 14. SA 15. SA 16. SA 17. 1 1 1 1 1 1 (For SA 25.A Only) 1 1 1 1 1 ** croblox® jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. 457 STARRETT-WEBBER GAGE BLOCKS Individual Rectangular Gage Blocks - Inch System croblox®, ceramic and steel croblox® AA A1 Grade 00 0 • • Size/Inches .010 .01005 .0101 Through .0109 in Steps of .0001 .011 Through .019 in Steps of .001 .020 (Wear Blocks) .020 or .02005 .0201 Through .0209 in Steps of .0001 .021 Through .029 in Steps of .001 .030 .040 .050 long* .050 (Wear Blocks) .050S or .050SS .05005 .0501 Through .0509 in Steps of .0001 .051 Through .059 in Steps of .001 .060 or .060SS .0625 (1/16) .070 or .070SS .078125 (5/64) .080 or .080SS .090 or .090SS .09375 (3/32) .100 long* .100 (Wear Blocks) .100S .100025 Ceramic AA A1 00 0 Steel A1 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • croblox® AA A1 Size/Inches Grade 00 0 .10005 • • .100075 • • .1001 Through .1009 in • • Steps of .0001 .109375 (7/64) • • .101 Through .109 in • • Steps of .001 .110 Through .119 in • • Steps of .001 .120 Through .129 in • • Steps of .001 .130 Through .139 in • • Steps of .001 .140 Through .149 in • • Steps of .001 .150 Long* • • .150 • • .160 Through .190 in • • Steps of .010 .200, .250, .300, .350 • • .400, .450, .500, • • .550, .600 .650, .700, .750 • • .800, .850, .900, .950 • • 1.000 • • 2.000 • • 3.000 • • 4.000 • • 5.000 6.000 Inch Ceramic AA A1 00 0 • • • • Steel A1 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Rectangular Block Sizes ◆ Width: all blocks are .352⬙ wide ◆ Length: for blocks under .050⬙, length is 1.115⬙ ◆ For blocks with .050 through .190⬙, length is 1.180⬙ ◆ For blocks .200⬙ and above, length is 1.380⬙ How To Order ◆ Specify in this sequence: shape, material, size and accuracy grade ◆ Key: Shape Material Size Accuracy R=Rectangular S=Steel (listed in table) S=Square C=croblox® Y=Ceramic ◆ Example: RS .250A1 = Rectangular Steel block, size .250, Grade A1 Accuracy *Order long length for Webber set replacements. 458 Exceptions ◆ 28 block sets with blocks to .090⬙ are all 1.115⬙ long. .050, .060, .070, .080, .090 blocks in this set are listed with the suffix “ss”. ◆ .050, .100, .150⬙ blocks contained in the 81–92-piece sets are 1.380⬙ long. Specify “long length”. ◆ .100⬙ block contained in the 36, 38, and 43-block sets are 1.380⬙ long. Specify “long length”. STARRETT-WEBBER GAGE BLOCKS Individual Square Gage Blocks – Inch System croblox® and steel Size/Inches Grade .010 .020 .02005 .0201 Through .0209 in Steps of .0001 .021 Through .029 in Steps of .001 .030 .040 .050 .060 .0625 (1/16) .070 .078125 (5/64) .080 .090 .09375 (3/32) .100 .100 (Wear with Chamfered Hole) .100025 .10005 .100075 .1001 Through .1009 in Steps of .0001 .109375 (7/64) .101 Through .149 in Steps of .001 .150 Through .190 in Steps of .010 .200 .250 .300 .350 .400, .450, .500, .550 .600, .650, .700, .750 .800, .850, .900, .950 1.000 2.000 3.000 4.000 croblox® AA A1 00 0 Steel A1 0 • • • • • Inch Square Steel Blocks Only Size/Inches 5.000 6.000 7.000 8.000 10.000 12.000 16.000 20.000 Grade AA 00 • • • • • • • • • A1 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Square Block Size ◆ All square blocks are .950 x .950⬙ ◆ Blocks have a .265⬙ hole in the center ◆ On blocks .200⬙ thick and over, the hole is countersunk on both faces (croblox® Wear Blocks are countersunk on one face only) How To Order ◆ Specify in this sequence: shape, material, size and accuracy grade ◆ Key: Shape Material Size Accuracy R=Rectangular S=Steel (listed in table) S=Square C-croblox® ◆ Example: SS .125A1 = Square Steel block, size .125 with a Grade A1 accuracy 459 STARRETT-WEBBER GAGE BLOCKS Heavy-Duty Steel – Inch System Gage Block Sets and Accessories Gaging Area Inch • • 17/32 x 1-1/2⬙ These heavy-duty gage block sets are primarily used for assembling together into exclusive Webber fixtures. Precision “yardsticks” and height gages can be built up to a required dimension by wringing blocks together and then by the use of eccentric clamps, locking them into place. All blocks over 1⬙ long have 1/4⬙ holes that accept eccentric clamps. All blocks 6⬙ or larger have an insulated center grip to eliminate temperature variations caused by handling. Precision scribers and dividers for tool layout can be created in a few seconds. The center point is on a .500⬙ center line of a 1⬙ block. The scriber point may be sharpened indefinitely without altering the original accuracy. No. HD 46.A1X. Snap gages with inside or outside calipers can be easily assembled using accessories like the eccentric clamps, a quick-acting clamp, and a pair of halfround or straight jaws. Snap gage is used to check inside dimensions of ring gage still mounted in internal grinder. Building up blocks into precision “yardsticks.” Precision scribers, dividers and snap gages. 460 STARRETT-WEBBER GAGE BLOCKS Heavy-Duty – Inch System Accessories (continued) Inch • • Indicator Accessory Set This heavy-duty accessory mounts on any build-up of heavy-duty blocks and measures the deviation of the work from nominal or desired size. (Indicator is set and checked for zero by placing blocks on any known flat surface.) HDA 10 and HDA 12 Indicator Accessory Sets consist of a holding block, extension jaw and a precision Starrett indicator. See catalog description below for indicator ranges and graduations. Above: Eccentric clamps are used for combining long blocks. Below: Quick-acting clamps are used for combining fractional inch blocks with blocks 1 or longer. Left: Indicator Accessory Set. Heavy-Duty Steel Accessories Individually or Sets as stated below Individual Accessories Wear Blocks croblox® Wear Blocks in .050 and .100 sizes are available for use with heavy-duty blocks. Size .050 .100 Catalog No. HDC .050 WA1 HDC .100 WA1 Description Half-Round Jaw* .500 Radius Scriber Point Center Point, .500 C/L Eccentric Clamp Quick-Acting Clamp Base Block 1.500 Thick No. of Steel Accessories Included All 42 thru 46 Piece Sets or 84 Piece Catalog No. Set when ordered with Accessories HDA 1. HDA 2. HDA 3. HDA 4. HDA 5. HDA 6. 2 1 1 (See set description next page for qty.) 1 1 Additional Accessories Straight Jaw* 1.000 Thick HDA 820. Indicator Set Consisting of Indicator Holding Block, Extension Jaw (1.000 Thick), Indicator with ±.010 Range .0005 Graduations, and Case HDA 10. Indicator Set As Above Except Indicator With ±.0015 Range .00005 Graduations HDA 12. * Jaws are normally used in pairs, but are ordered individually. Please order accordingly. 461 STARRETT-WEBBER GAGE BLOCKS Heavy-Duty Steel – Inch System Gage Block Steel Gage BlockSets Sets inand Case Accessories – 17/32⬙ x 1-1/2⬙ Gaging Area Measuring Range .100-12.000 in Steps of .001 .200-12.000 in Steps of .0001 .300-12.000 in Steps of .00005 • Inch B89.1.9 Accuracy Grade 0* Blocks Per Set 84 .200-48.000 in Steps of .001 .300-48.000 in Steps of .0001 46 .200-36.000 in Steps of .001 .300-36.000 in Steps of .0001 44 .200-24.000 in Steps of .001 .300-24.000 in Steps of .0001 42 Blocks Included In Sets 2 Blocks .100 Wear croblox® 1 Block .10005 9 Blocks .1001 Through .1009 (Steps of .0001) 49 Blocks .101 Through .149 (Steps of .001) 19 Blocks .050 Through .950 (Steps of .050) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) 3 Eccentric Clamps Above Set Also Available With 2 Additional Eccentric Clamps and Accessories** (Extra) 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 9 Blocks .100 Through .900 (Steps of .100) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) 6 Blocks 6.000 10 Eccentric Clamps and Accessories** (Included) 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 9 Blocks .100 Through .900 (Steps of .100) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) 4 Blocks 6.000 8 Eccentric Clamps and Accessories** (Included) 9 Blocks .1001 Through .1009 (Steps of .0001) 9 Blocks .101 Through .109 (Steps of .001) 9 Blocks .110 Through .190 (Steps of .010) 9 Blocks .100 Through .900 (Steps of .100) 4 Blocks 1.000 Through 4.000 (Steps of 1⬙) 2 Blocks 6.000 6 Eccentric Clamps and Accessories** (Included) Catalog No. HD 84.A1 HD 46.A1X HD 44.A1X HD 42.A1X NOTES: Case for HD 84.A1 has space for accessories and six 6.000⬙ heavy-duty blocks. To order with accessories, add “X” to catalog number. * For complete accuracy specifications, see page at the beginning of this section. ** See previous page for details. Individual Heavy-Duty Gage Blocks – Steel Only Block Size .050 .100, .100025, .10005, .100075 .1001 Through .1009 In Steps of .0001 .101 Through .149 In Steps of .001 NOTES: Sets include etched serial numbrs and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. Separate cases for Gage Block Sets are also available. 462 • .150 Through .190 In Steps of .010 .200 Through .950 In Steps of .050 1.000 2.000 3.000 4.000 6.000 6.000 Heavy-Duty Block with Eccentric Clamp and Case 10.000 20.000 To order individual blocks, specify HD followed by size and accuracy grade. Example: HD .050 A1 STARRETT-WEBBER GAGE BLOCKS Metric System Gage Block Sets, Individual Blocks and Accessories The following pages include these metric system items in the order shown: Rectangular gage blocks and accessories • Square gage blocks and accessories Metric rectangular 88 piece and square 112 sets are shown. Mini-Metric Rectangular Steel Gage Block Set No. RS 9.MA1 This mini-metric set of precision gage blocks calibrates micrometers, vernier gages and similar measuring tools. The gage blocks are also useful as setting masters for comparator-type dimensional gages and are useful in teaching the basics of metric measurement. The set has a capacity of 61mm in 1, 0.5mm or 0.25mm steps. Its nine hardened steel blocks include these sizes: 1, 2, 2.25, 2.5, 3, 5, 10, 15 and 25mm. They are finished to B89.1.9 Accuracy Grade 0 and are furnished in a lined metal case. Metric re set No. RS 9.MA1 463 STARRETT-WEBBER GAGE BLOCKS Rectangular croblox® – Metric System Gage Block Sets in Case Metric One Millimeter Base Accuracy Grade* Measuring Range B89.1.9 0 3.0 Through 450 (Steps of .001mm) 2.0 Through 450 (Steps of .01mm) 1.0 Through 450 (Steps of .1mm) B89.1.9 00 B89.1.9 0 3.0 Through 450 (Steps of .0005mm) 2.0 Through 450 (Steps of .001mm) 1.0 Through 450 (Steps of .01mm) B89.1.9 00 1.0 Through 450 (Steps of .1mm) B89.1.9 0 B89.1.9 00 3.0 Through 250 (Steps of .0005mm) 2.0 Through 250 (Steps of .001mm) 1.0 Through 250 (Steps of .01mm) 1.0 Through 250 (Steps of .1mm) Blocks Per Set Blocks Included In Sets 9 Blocks 1.001mm Through 1.009mm (Steps of .001mm) 9 Blocks 1.01mm Through 1.09mm (Steps of .01mm) 45 9 Blocks 1.1mm Through 1.9mm (Steps of .1mm) 9 Blocks 1mm Through 9mm (Steps of 1mm) 9 Blocks 10mm Through 90mm (Steps of 10mm) 1 Block .5mm 1 Block 1.0005mm 88 9 Blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 Blocks 1.01mm Through 1.49mm (Steps of .01mm) 18 Blocks 1mm Through 9.5mm (Steps of .5mm) 10 Blocks 10mm Through 100mm (Steps of 10mm) 1 Block .5mm 1 Block 1.0005mm 112 9 Blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 Blocks 1.01mm Through 1.49mm (Steps of .01mm) 48 Blocks 1mm Through 24.5mm (Steps of .5mm) 4 Blocks 25mm Through 100mm (Steps of 25mm) Catalog No. RC 45.MA1 RC 45.MAA RC 88.MA1 RC 88.MAA RC 112.MA1 RC 112.MAA NOTE: Sets include etched serial numbers and Commercial Grade Calibration Certificate. Metric croblox® Wear Blocks and/or Master Grade Calibration Certificate are available at extra cost. For gage block accessories, order AC 11.MA Metric Accessory Set in Case. For complete accuracy specifications, see page at the beginning of this section. * 464 STARRETT-WEBBER GAGE BLOCKS Rectangular Ceramic – Metric System Gage Block Sets in Case Metric Now there’s another addition to the famous Starrett-Webber line of precision gage blocks. Ceramic, offered in rectangular, inch and metric, fills the gap between steel and the universally accepted croblox®. While not as stable as croblox®, ceramic is an excellent alternative to steel because of its superior hardness, thermal expansion and wear characteristics. Set No. RY 88.MA1. Accuracy Grade* B89.1.9 0 B89.1.9 00 B89.1.9 0 B89.1.9 00 Measuring Range 3.0 Through 450 in .001mm Steps 2.0 Through 450 in .01mm Steps 1.0 Through 450 in .1mm Steps Blocks Per Set 45 3.0 Through 450 in .0005mm Steps 2.0 Through 450 in .001mm Steps 88 1.0 Through 450 in .01mm Steps 1.0 Through 450 in .1mm Steps Blocks Included In Sets 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 9 blocks 1.01mm Through 1.09mm (Steps of .01mm) 9 blocks 1.1mm Through 1.9mm (Steps of .1mm) 9 blocks 1mm Through 9mm (Steps of 1mm) 9 blocks 10mm Through 90mm (Steps of 10mm) 1 block .5mm 1 block 1.0005mm 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 blocks 1.01mm Through 1.49mm (Steps of .01mm) 18 blocks 1mm Through 9.5mm (Steps of .5mm) 10 blocks 10mm Through 100mm (Steps of 10mm) Catalog No. RY 45.MA1 RY 45.MAA RY 88.MA1 RY 88.MAA NOTE: Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 465 STARRETT-WEBBER GAGE BLOCKS Rectangular Steel – Metric System Gage Block Sets in Case One Millimeter Base Measuring Range 1.0 Through 61.0 in 1.0mm Steps 2.0 Through 61.0 in .5mm Steps 4.0 Through 61.0 in .25mm Steps B89.1.9 Accuracy Grade 0* Blocks Per Set 9 3.0 Through 450 in .001mm Steps 2.0 Through 450 in .01mm Steps 1.0 Through 450 in .1mm Steps 45 3.0 Through 450 in .0005mm Steps 2.0 Through 450 in .001mm Steps 1.0 Through 450 in .01mm Steps 1.0 Through 450 in .1mm Steps 88 3.0 Through 250 in .0005mm Steps 2.0 Through 250 in .001mm Steps 1.0 Through 250 in .01mm Steps 1.0 Through 250 in .1mm Steps 112 Micrometer Checking Set 10 Blocks Included in Sets 3 blocks 1.0mm, 2.0mm, 2.25mm 4 blocks 2.5mm, 3.0mm, 5.0mm, 10.0mm 2 blocks 15.0mm, 25.0mm 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 9 blocks 1.01mm Through 1.09mm (Steps of .01mm) 9 blocks 1.1mm Through 1.9mm (Steps of .1mm) 9 blocks 1mm Through 9mm (Steps of 1mm) 9 blocks 10mm Through 90mm (Steps of 10mm) 1 block .5mm 1 block 1.0005mm 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 blocks 1.01mm Through 1.49mm (Steps of .01mm) 18 blocks 1mm Through 9.5mm (Steps of .5mm) 10 blocks 10mm Through 100mm (Steps of 10mm) 1 block .5mm 1 block 1.0005mm 9 blocks 1.001mm Through 1.009mm (Steps of .001mm) 49 blocks 1.01mm Through 1.49mm (Steps of .01mm) 48 blocks 1mm Through 24.5mm (Steps of .5mm) 4 blocks 25mm Through 100mm (Steps of 25mm) B89.1.9 Accuracy Grade AS1* 10 blocks 2.5mm, 5.1mm, 7.7mm, 10.3mm, 12.9mm 15.0 mm, 17.6mm, 20.2mm, 22.8mm, 25.0mm NOTES: No. AC 11.MA Metric Accessory Set in Case, metric croblox Wear Blocks in sets, etched serial numbers, and Certificate of Calibration are all available at extra cost. See rectangular metric block accessories on the next page. For complete accuracy specifications, see page at the beginning of this section. * ® 466 Metric Catalog No. RS 9.MA1 MINI-METRIC RS 45.MA1 RS 88.MA1 RS 112.MA1 RS 10.MA STARRETT-WEBBER GAGE BLOCKS Rectangular Gage Block Accessories Steel and croblox® – Metric System Metric No. AC 11.MA. ® Rectangular Steel and croblox Accessories Individually or Sets as stated below Individual Accessories Rectangular croblox® Wear Blocks Size 1.0mm 2.0mm Catalog No. RCM 1.0 WA1 RCM 2.0 WA1 ** croblox® jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. Description Half-Round Jaw** 5mm Radius Straight Jaw** 5mm Thick Clamps 0-38mm Capacity 38-100mm Capacity 100-165mm Capacity 0-300mm Capacity Scriber Point Center Point, 2mm C/L Base Block, 25mm Thick Case (CS 9111.) Additional Accessories Clamps 0-450mm Capacity 0-600mm Capacity 0-900mm Capacity No. of Steel Accessories Included Catalog No. Steel croblox® Set No. AC 11.MA RA 101. 2 RA 104. RA 204. 2* RA 5. RA 6. RA 7. RA 8. RA 11. RA 112. RA 113. 1 1 1 1 1 1 1 1 RA 9. RA 10. RA 14. 467 STARRETT-WEBBER GAGE BLOCKS Square Combination croblox® and Steel – Metric System Gage Block Sets in Case An ideal combination of value, price and convenience, these sets include a popular selection of croblox® and steel as listed. Two Millimeter Base Measuring Range Blocks Per Set 6.0 Through 450 in .001mm Steps 4.0 Through 450 in .01mm Steps 2.0 Through 450 in .1mm Steps 45 6.0 Through 450 in .001mm Steps 4.0 Through 450 in .01mm Steps 2.0 Through 450 in .1mm Steps 45 6.0 Through 450 in .0005mm Steps 4.0 Through 450 in .001mm Steps 2.0 Through 450 in .01mm Steps 2.0 Through 450 in .1mm Steps 88 6.0 Through 250 in .0005mm Steps 4.0 Through 250 in .001mm Steps 2.0 Through 250 in .01mm Steps 2.0 Through 250 in .1mm Steps 112 B89.1.9 Accuracy Grade 0* Blocks** Included in Sets 9 Blocks 2.001 Through 2.009 (Steps of .001mm) 9 Blocks 2.01 Through 2.09 (Steps of .01mm) 9 Blocks 2.1 Through 2.9 (Steps of .1mm) 9 Blocks 1.0 Through 9.0 (Steps of 1.0mm) 9 Blocks 10 Through 90 (Steps of 10mm) Same as Above Plus the Following Accessories: 1 pair SA 102. 6 mm Radius Jaws 1 each SA 4. Scriber Point 2 each SA 7. Knurled Screws 2 each SA 8. Studs 2 each SA 9. Flat Head Screws (long) 2 each SA 10. Flat Head Screws (short) 2 each SA 11. Slotted Nuts 1 each SA 12. 19mm Tie Rod 1 each SA 13. 38mm Tie Rod 1 each SA 14. 57mm Tie Rod 1 each SA 15. 76mm Tie Rod 1 each SA 16. 114-152mm Tie Rod (adjustable) 1 Block .5mm 1 Block 2.0005mm 9 Blocks 2.001 Through 2.009 (Steps of .001mm) 49 Blocks 2.01 Through 2.49 (Steps of .01mm) 18 Blocks 1.0 Through 9.5 (Steps of .5mm) 10 Blocks 10 Through 100 (Steps of 10mm) 1 Block .5mm 1 Block 2.0005mm 9 Blocks 2.001 Through 2.009 (Steps of .001mm) 49 Blocks 2.01 Through 2.49 (Steps of .01mm) 48 Blocks 1.0 Through 24.5 (Steps of .5mm) 4 Blocks 25 Through 100 (Steps of 25mm) Metric • Catalog No. S2C 45.MA1 S2C 45.MA1X S2C 88.MA1 S2C 112.MA1 **NOTE: All blocks are croblox®, except sizes below 1.5mm and above 10mm, which are steel. NOTE: Metric croblox® Wear Blocks are available as option. Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. For complete accuracy specifications, see page at the beginning of this section. ** Internal Measuring Machine Jaws croblox® No. SA 712. Steel No. SA 711. Double ended, self proving- assures parallelism and squareness. Designed for use with square style gage blocks, jaws are made of long-wearing croblox® or steel 50.8mm long, 25.4mm wide and 12mm thick. Both side edges are lapped 90º square to the gaging faces within 30 seconds of arc and extend beyond the gage blocks in the combination, thus forming a square master. Jaw and gage combination parallelism is checked merely by turning the combination to the opposite side and rechecking the reading. Furnished in pairs. 468 STARRETT-WEBBER GAGE BLOCKS Square Steel – Metric System Gage Block Sets in Case Two Millimeter Base Measuring Range Blocks Per Set 6.0 Through 450 in .001mm Steps 4.0 Through 450 in .01mm Steps 2.0 Through 450 in .1mm Steps 45 6.0 Through 450 in .001mm Steps 4.0 Through 450 in .01mm Steps 2.0 Through 450 in .1mm Steps 45 6.0 Through 450 in .0005mm Steps 4.0 Through 450 in .001mm Steps 2.0 Through 450 in .01mm Steps 2.0 Through 450 in .1mm Steps 88 6.0 Through 250 in .0005mm Steps 4.0 Through 250 in .001mm Steps 2.0 Through 250 in .01mm Steps 2.0 Through 250 in .1mm Steps 112 125mm to 2100mm 8 125mm to 2100mm 8 Metric B89.1.9 Accuracy Grade 0 Blocks Included in Sets 9 Blocks 2.001mm Through 2.009mm (Steps of .00mm) 9 Blocks 2.01mm Through 2.09mm (Steps of .01mm) 9 Blocks 2.1mm Through 2.9mm (Steps of .1mm) 9 Blocks 1.0mm Through 9mm (Steps of 1.0mm) 9 Blocks 10mm Through 90mm (Steps of 10mm) Same as Above Plus the Following Accessories: 1 Pair SA 102. 6mm Radius Jaws 1 Each SA 4. Scriber Point 2 Each SA 7. Knurled Screws 2 Each SA 8. Studs 2 Each SA 9. Flat Head Screws (Long) 2 Each SA 10. Flat Head Screws (Short) 2 Each SA 11. Slotted Nuts 1 Each SA 12. 19mm Tie Rod 1 Each SA 13. 38mm Tie Rod 1 Each SA 14. 57mm Tie Rod 1 Each SA 15. 76mm Tie Rod 1 Each SA 16. 114-152mm Tie Rod (adjustable) 1 Block .5mm 1 Block 2.0005mm 9 Blocks 2.001mm Through 2.009mm (Steps of .001mm) 49 Blocks 2.01mm Through 2.49mm (Steps of .01mm) 18 Blocks 1.0mm Through 9.5mm (Steps of .5mm) 10 Blocks 10mm Through 100mm (Steps of 10mm) 1 Block .5mm 1 Block 2.0005mm 9 Blocks 2.001mm Through 2.009mm (Steps of .001mm) 49 Blocks 2.01mm Through 2.49mm (Steps of .01mm) 48 Blocks 1.0mm Through 24.5mm (Steps of .5mm) 4 Blocks 25mm Through 100mm (Steps of 25mm) 8 Blocks, 125mm, 150mm, 175mm, 200mm, 250mm, 300mm, 400mm, 500mm Accessories Included: 6 Each SA 8. Studs 2 Each SA 9. Flat Head Screws (long) 2 Each SA 10. Flat Head Screws (short) 1 Each SA 16. 114-152mm Tie Rod (adjustable) 1 Each SA 17. 152-228mm Tie Rod (adjustable) 1 Each SA 18. 298mm Tie Rod 1 Each SA 19. 400mm Tie Rod 2 Each SA 20. 502mm Tie Rods B89.1.9 Accuracy Grade 00* Same as Above SS 8.MA1X • Catalog No. S2S 45.MA1 S2S 45.MA1X S2S 88.MA1 S2S 112.MA1 SS 8.MA1X SS 8.MAAX NOTE: Sets include etched serial numbers and Commercial Grade Calibration Certificate. A Master Grade Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. 469 STARRETT-WEBBER GAGE BLOCKS Square Steel or croblox® – Metric System Gage Block Accessories Metric No. SA 25.MA. Square Steel and croblox® Accessories Individually or Sets as stated below Individual Accessories Square croblox® Wear Blocks Size 2.0mm with 1 Side Countersunk Catalog No. SCM 2.0 WA1 ** croblox® jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. NOTE: Set No. SS 8.MA1X and SS 8.MAAX furnished with 6 studs, 2 short screws, 2 long screws, one each 114mm, 152mm, 298mm, 400mm tie rods and two 502mm tie rods. 470 Description Half-Round Jaw** 3mm Radius 6mm Radius Straight Jaw** 12mm Thick Scriber Point Center Point 2mm C/L Base Block 12mm Thick Knurled Screw Stud Flat Head Screw Long Short Slotted Nut Tie Rods 19mm Solid 38mm Solid 57mm Solid 76mm Solid 114-152mm Adjustable 152-228mm Adjustable Case (CS 9168.) Additional Accessories Tie Rods 298mm 400mm 502mm • Catalog No. Steel croblox® No. of Steel Accessories Included 45 Block Set when ordered Set No. SA 25.MA with Accessories SA 101. SA 102. 2 2 SA 103. SA 203. SA 4. SA 105. SA 106. SA 7. SA 8. 2* 1 1 1 2 2 SA 9. SA 10. SA 11. 2 2 2 2 2 2 SA 12. SA 13. SA 14. SA 15. SA 16. SA 17. 1 1 1 1 1 1 1 1 1 1 1 1 SA 18. SA 19. SA 20. 2 1 2 2 STARRETT-WEBBER GAGE BLOCKS Individual Rectangular and Square Gage Blocks - Metric System croblox®, ceramic and steel Size/Millimeters croblox® Ceramic Steel AA A1 AA A1 A1 Grade 00 0 00 0 0 0.3, 0.4* 0.5** 0.6 Through 0.9 in .1mm Steps* 1.0 or 1.0005 1.0 Wear Blocks 1.001 Through 1.009 in Steps of .001 1.01 Through 1.14 in Steps of .01 1.15 Through 1.49 in Steps of .01 1.5 Through 1.9 in Steps of .1 2.0 2.0 Wear Blocks 2.5 3.0 Through 4.5 in Steps of .5 5.0 Through 6.5 in Steps of .5 7.0 Through 10.0 in Steps of .5 10.5 Through 14.5 in Steps of .5 15.0 15.5 Through 19.5 in Steps of .5 20.0 20.5 Through 24.5 in Steps of .5 25.0 and 30.0 40.0 50.0 60.0 70.0 75.0 and 80.0 90.0 100.0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Square Rectangular • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Rectangular Block Sizes Width: ◆ All blocks are 9mm wide Lengths: ◆ For blocks 10mm thick and under, length is 30mm ◆ For blocks 10.5mm thick and above, length is 35mm Exceptions: *Blocks are 28.3mm long **When ordering the 0.5mm block, specify length (28.3 or 30mm) How To Order ◆ Specify in this sequence: shape, material, “M” for Metric, size, accuracy grade Key: Shape Material Metric Size Accuracy R = Rectangular S = Steel M (listed in table) S = Square C = croblox® Y = Ceramic ◆ Example: RSM 2.0. A1 = Rectangular Steel block, Metric size 2.0, Grade A1 Accuracy Sizes/Millimeters croblox® A1 Grade 0 0.5 mm Only 1.0 1.5 2.0 Wear Blocks with 1 Side Countersunk 2.0 or 2.0005 2.001 Through 2.009 in .001mm Steps 2.01 Through 2.49 in .01mm Steps 2.5 Through 2.9 in .1mm Steps 3.0 Through 10.0 in .5mm Steps 10.5 Through 14.5 in .5mm Steps 15mm 15.5 Through 19.5 in .5mm Steps 20.0mm Only 20.5 Through 24.5 in .5mm Steps 25.0 30.0 40.0 50.0 60.0 70.0 75.0 80.0 90.0 100.0 • Steel A1 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Steel Only Grade 00 125.0 150.0 175.0 200.0 250.0 300.0 400.0 500.0 • • • • • • • • 0 • • • • • • • • Square Block Size ◆ All blocks are 24.1mm x 24.1mm ◆ Blocks have a 6.7mm hole in the center ◆ On blocks 5.0mm thick and over, the hole is countersunk on both faces. (croblox® Wear Blocks are countersunk on one face only) 471 STARRETT-WEBBER GAGE BLOCKS Standard Reference Bars Inch 12⬙, 19⬙, 25⬙, 37⬙, 49⬙ Millimeter 300, 500, 650, 950, 1250mm These Standard Reference Bars are invaluable for use in checking table movement of machine tools, accuracy of vernier height gages, surface plate transfer measurement, and for final inspection of precision machine tools and coordinate measuring machines. The “channel design” places additional measuring pads at appropriate points over the length of the bar as reference points for x, y or z axis measurements. Channel design permits use of the bar on its base (vertical) or on its back or either side (horizontal). The alternating gage block jaws and spacer blocks are permanently wrung and fastened together to form 1⬙ increments for inch bars and 25mm increments for metric bars. A special bushing arrangement allows the master stack to conform to thermal conditions prevailing during use, thus providing a true master even under less than perfect laboratory conditions. Mating surfaces are treated during assembly to prevent corrosion. Non-standard lengths and measuring increments are available on special order. A Certificate of Calibration is included. All models are furnished with storage case. Height Gages Starrett/Webber-built height gages and accessories are described elsewhere in this catalog, as noted. Left: DIGI-CHEK Height Gage – see Page 127. Right: DIGI-CHEK II – see Page 126. Standard Sizes are 12⬙, 19⬙, 25⬙, 37⬙ and 49⬙ in the inch system and 300mm, 500mm, 650mm, 950mm and 1250mm in the millimeter system. Specifications Description Tolerance (Stack) Maximum: Minimum: Parallelism: Gage surfaces to Base and Each Other Uncertainty of Calibration Inch System expressed in µin. 2.5L + 10 L in inches - 10 Millimeter System expressed in µm .0025L + .25 L in millimeters - .25 15 µin. 0.4 µm 10 + 2.0L L in inches expressed in µin. 25 + .002L L in millimeters expressed in µm. Note: The accuracy of the surface that supports the gage must be taken into account when determining the accuracy of any measurements With Channel Design Inch System Size Catalog No. 12" RBC 12. 19" RBC 19. 25" RBC 25. 37" RBC 37. 49" RBC 49. EDP No. 92626 92627 92628 92629 92630 Millimeter System Size Catalog No. 300mm RBCM 300. 500mm RBCM 500. 650mm RBCM 650. 950mm RBCM 950. 1250mm RBCM 1250. Free Standing Stack Without Channel Design – Vertical Position Only Inch System Size Catalog No. 8" RB 8. 10" RB 10. 12" RB 12. 18" RB 18. EDP No. 92616 92623 92624 92625 Millimeter System Size Catalog No. 200mm RBM 200. 250mm RBM 250. 300mm RBM 300. 450mm RBM 450. Left: DIGI-CHEK Reverse Reading Blocks and Right: DIGI-CHEK Riser Blocks – see Page 129. 472 EDP No. 93642 92617 93053 92619 92620 EDP No. 93261 93262 93263 93264 STARRETT-WEBBER GAGE BLOCKS Angle Gage Block Sets Webber Angle Gage Blocks permit fast, simple and accurate measurements of any angle. They are far superior to sine bar measuring methods, that involve trigonometric formulae and complex stacks of gage blocks. Angle gage blocks come in three accuracies, croblox® Reference Angle Blocks with a 1-second accuracy, steel Calibration Grade Angle Blocks with 2-second accuracy, and steel Working Grade Angle Blocks with 5-second accuracy. Each grade can be purchased in sets that will measure in steps of onesecond, one-minute or one-degree to suit any need. (See angle block specification information on next two pages.) ◆ Reference Angle Blocks croblox®: 1-second accuracy Designed for optical or as reference standards for autocollimators, spectrometers, etc. They are unsurpassed for use in aerospace, optical and precision instrument fields. ◆ Calibration Angle Blocks Steel: 2-second accuracy The same high quality as the Reference Grade Angle Blocks ◆ Working Angle Blocks Steel: 5-second accuracy These angles are designed for shop or tool room. The longer gaging surfaces are made for use with an indicator. These blocks reduce set-up time and minimize error in grinding both simple and compound angles Above: No. AG 16.R Below: No. AG 18.W. Catalog No. AG 6.R AG 6.C AG 8.W AG 11.R AG 11.C Note: The catalog numbers and specifications of our angle gage blocks have been changed in response to updated requirements concerning the application of the uncertainty of measurement. See the next two pages for information regarding the specifications of our angle blocks. AG 13.W AG 16.R AG 16.C AG 18.W Description/ Accuracy Grade Reference Grade ±1.0 Second Calibration Grade ±2.0 Seconds Working Grade ±5.0 Seconds Reference Grade ±1.0 Second Calibration Grade ±2.0 Seconds Working Grade ±5.0 Seconds Reference Grade ±1.0 Second Calibration Grade ±2.0 Seconds Toolroom ±5.0 Seconds Blocks Per Set Measuring Range 6 0-99º in 1° Steps 6 Blocks, 1°, 3°, 5°, 15°, 30°, 45° 11 16 Blocks Included In Sets 0-99º in 1' Steps 6 Blocks, 1°, 3°, 5°, 15°, 30°, 45° 5 Blocks, 1', 3', 5', 20', 30' 6 Blocks, 1°, 3°, 5°, 15°, 30°, 45° 0-99º in 1" Steps 5 Blocks, 1', 3', 5',20' 30' 5 Blocks, 1", 3", 5", 20", 30" NOTE: One 6⬙ (150mm) parallel and one 6⬙ (150mm) knife edge are included with Working Grade Sets. All sets furnished in case. Cases also available separately. Order as follows: The Calibration Set and the Reference Case No. is CS 9135. The Working Case No. is CS 9134. To order individually, specify in the following key sequence: Key: AngleGage Numeric Size Angle Units Prefix of Angle (Degree, Min., Sec.) AG 45 D Example: AG 45.DR = a Reference Grade 45º Angle Block Accuracy Grade R, C, or W R 473 STARRETT-WEBBER GAGE BLOCKS Angle Gage Block Specifications Accuracy In Microinches (Microns) Reference Grade Calibration Grade Working Grade ® Material croblox Steel Steel Tolerances: Deviation From Nominal ±1.0 second ±2.0 second ±5.0 second Flatness of Gaging Surfaces 6µin. (0.15µm) 8µin. (0.20µm) 14µin. (0.35µm)** Flatness & Parallelism of Sides 8µin. (0.20µm) 8µin. (0.20µm) 16µin.* (0.40µm)** Squareness of Sides to Gaging Surfaces 6 seconds 8 seconds 12 seconds † Area of Gaging Surfaces 1" x 2" (25 x 50mm) 1" x 2" (25 x 50mm) 5/8" x 4" (16 x 100mm) Surface Finish (Gage Surfaces Only) 0.4µin. AA (.01µm AA) 0.6µin. AA (.015µm AA) 1.0µin. AA (.025µm AA) Estimated Uncertainty of Measurement (k=2) 0.6 seconds 1.0 seconds 3.5 seconds Flatness tolerances exclude 1.5mm from the edges on all angle blocks except where marked with **. Then 3mm from the edge is excluded. † Dimension of gaging surfaces in millimeters is approximate. Using Angle Gage Blocks Superior to Sine Bar Methods A precision angle has always been difficult to set because of the involved trigonometric formula that is used with the sine bar. The main difficulty lies in the dimension X in diagram which often results in a figure with many decimal places. Gage blocks can only approximate this value. For example, to measure 44º30⬘ using a 5⬙ sine bar the following steps are required: A B Sine for 44º30⬘⬘ angle For dimension X multiply by 5 .7009093 3.5045465 .1005 Gage Blocks necessary .104 to match this dimension .300 3.000 3.5045000 3.5045465 – 3.5045 = Residual error .0000465 that the plus end of 45º block contacts the minus end of 30⬘ block, and you have an angle of 44º30⬘. It is not only easy to accomplish, it is absolutely accurate. With angle gage blocks, you take a 45º block from the set, wring on a 30⬘ block so This error cannot be eliminated in sine bar procedure. Ease and Versatility A set consisting of only 16 blocks will measure 356,400 angles in steps of one second, to an accuracy of 1/5,000,000th of a circle! These micro-accurate blocks can be used in either plus or minus positions. In “A”, right, example, take the 30º angle and add the 5º angle to obtain a measurement of 35º (making sure that both plus ends are together). In “B” use the same two blocks but wring them together so that the minus end of the 5º block is over the plus end of the 30º block. This will subtract 5º from 30º, thus giving your 25º measurement. Indexing a Large Rotary Table A Webber Angle Block or True Square is positioned on the work and a beam of light from an autocollimator is directed against the gaging surface. This becomes 0º, or the reference surface. Other angle blocks are then added in proper combination to measure each succeeding angle. The table is rotated and inspected at each position with reference to the light beam. This method indexes large workplaces quickly, with accuracy measured in fractional seconds. Inspecting a Simple Angle The photo below shows a workpiece on which an angle of 30º is required. The workpiece is resting on a parallel* which is wrung to angle blocks forming 30º. The entire set-up is lined up vertically with an angle plate and then indicated across the top of the work to determine the correctness of the angle. *Parallels are not necessary, but they are convenient because of their longer reference surface. 474 Setting a Revolving Magnetic Chuck A chuck is set for a 38º angle. Three blocks, +30º, +5º and +3º, are assembled and mounted with the parallel*. The indicator quickly tells if the setting is accurate. Adjustment is a matter of seconds. A revolving chuck teams up perfectly with angle blocks to make possible several applications in tool grinding that are more difficult with other methods. STARRETT-WEBBER GAGE BLOCKS True Squares True squares are designed for fast, precision indexing with angle gage blocks. All faces of Webber True Squares are at precisely 90º to adjacent sides, with perfect optical flatness and parallelism to permit use with autocollimators. Applications for fast precision indexing and setting of angular grinding fixtures are almost unlimited. For example: the work and the true square are mounted together on a revolving fixture. A notch is ground by two successive cuts, one at 90º with the true square, and the other at 2º with the addition of two angle blocks (+3º and –1º) mounted on square. An indicator reading is taken before each grind. This process is then repeated by turning the True Square to successive zero readings. True Squares are designed for use as an accessory to our angle gage blocks to easily make angles greater that 45° and through 180°. Webber True Squares also permit a fast, easy check of indexing tables. The gaging faces are at precise 90° angles with optical flatness and finishes that permit the use of autocollimators. NOTE: The catalog numbers and specifications of our true squares have been changed in response to updated requirements concerning the application of the uncertainty of measurement. True Square Specifications Catalog No. Grade Material Tolerances: Deviation From Nominal Flatness of Gaging Surfaces Flatness & Parallelism of Sides Squareness of Sides to Gaging Surfaces TS 21.R Reference croblox® TS 21.C Calibration Steel TS 44.W Working Steel TS 66.W Working Steel ±1.0 second ±2.0 second ±5.0 second ±5.0 second 6µin. (0.15µm) 8µin. (0.20µm) 8µin. (0.20µm) 8µin. (0.20µm) 14µin. (0.35µm)** 16µin. (0.40µm)** 14µin. (0.35µm)** 16µin. 0.40µm)* * 6 seconds 8 seconds 12 seconds 12 seconds 1" x 2" (25 x 50mm) 0.6µin. AA (.015µm AA) 5/8" x 4" (16 x 100mm) 1.0µin. AA (.025µm AA) 5/8" x 6" (16 x 150mm) 1.0µin. AA (.025µm AA) 1.0 seconds 3.5 seconds 4.0 seconds † 1" x 2" Area of Gaging Surfaces (25 x 50mm) 0.4µin. AA (0.1µm AA) Surface Finish (Gage Surfaces Only) Estimated Uncertainty of 0.6 seconds Measurement (K=2) Flatness tolerances exclude 1.5mm from the edges on all angle blocks except where marked with **. Then, 3mm from the edge is excluded. † Dimension of gaging surfaces in millimeters is approximate. Case included with all true squares. 475 STARRETT-WEBBER GAGE BLOCKS True Squares True squares are designed for fast, precision indexing with angle gage blocks. All faces of Webber True Squares are at precisely 90º to adjacent sides, with perfect optical flatness and parallelism to permit use with autocollimators. Applications for fast precision indexing and setting of angular grinding fixtures are almost unlimited. For example: the work and the true square are mounted together on a revolving fixture. A notch is ground by two successive cuts, one at 90º with the true square, and the other at 2º with the addition of two angle blocks (+3º and –1º) mounted on square. An indicator reading is taken before each grind. This process is then repeated by turning the True Square to successive zero readings. True Squares are designed for use as an accessory to our angle gage blocks to easily make angles greater that 45° and through 180°. Webber True Squares also permit a fast, easy check of indexing tables. The gaging faces are at precise 90° angles with optical flatness and finishes that permit the use of autocollimators. NOTE: The catalog numbers and specifications of our true squares have been changed in response to updated requirements concerning the application of the uncertainty of measurement. True Square Specifications Catalog No. Grade Material Tolerances: Deviation From Nominal Flatness of Gaging Surfaces Flatness & Parallelism of Sides Squareness of Sides to Gaging Surfaces TS 21.R Reference croblox® TS 21.C Calibration Steel TS 44.W Working Steel TS 66.W Working Steel ±1.0 second ±2.0 second ±5.0 second ±5.0 second 6µin. (0.15µm) 8µin. (0.20µm) 8µin. (0.20µm) 8µin. (0.20µm) 14µin. (0.35µm)** 16µin. (0.40µm)** 14µin. (0.35µm)** 16µin. 0.40µm)* * 6 seconds 8 seconds 12 seconds 12 seconds 1" x 2" (25 x 50mm) 0.6µin. AA (.015µm AA) 5/8" x 4" (16 x 100mm) 1.0µin. AA (.025µm AA) 5/8" x 6" (16 x 150mm) 1.0µin. AA (.025µm AA) 1.0 seconds 3.5 seconds 4.0 seconds † 1" x 2" Area of Gaging Surfaces (25 x 50mm) 0.4µin. AA (0.1µm AA) Surface Finish (Gage Surfaces Only) Estimated Uncertainty of 0.6 seconds Measurement (K=2) Flatness tolerances exclude 1.5mm from the edges on all angle blocks except where marked with **. Then, 3mm from the edge is excluded. † Dimension of gaging surfaces in millimeters is approximate. Case included with all true squares. 475 STARRETT-WEBBER GAGE BLOCKS Optical Polygons Webber Optical Polygons provide an easy, accurate method of checking and calibrating angles. They are designed for use with autocollimators in measuring angle spacing. The exclusive one-piece design provides compact, fixed master for precise angle spacing. Target faces are highly reflective and optically flat. A 1 mounting hole, flanged bushing, lapped washer and hold-down bolt, furnished with each unit, permit mounting the polygon in any desired attitude. Available in two accuracy grades. Furnished in case. Certificate of Calibration included. Chrome carbide polygons provide a hardness of Rockwell 71-73 C and a corrosion resistance 10-20 times that of 18-8 stainless steel, resulting in lifetime accuracy. Maintenance problems are virtually eliminated due to their ruggedness and extreme stability. To order polygons, specify number in the following key/sequence: Optical Polygon OP No./Faces Decimal Accuracy Grade Example: OP 3.0 = A 3-sided optical polygon with a 0 Reference Accuracy croblox Reflecting Cubes ® Stable and maintenance free, reflecting cubes are ideal for 90º indexing or alignment in optical tooling or inspection. Reflectivity: 55% in visible spectrum, 87-88% at 10.6 microns. Starrett-Webber stocks semi-finished solid cube blanks in four standard sizes: 3/4 (19.0mm), 1 (25.4mm), 1 1/2 (38.1mm) and 2 (50.8mm). Also available as standard is a .950 (24mm) square with a 17/64 (6.7mm) countersunk center hole. Specifications No. of Sides 3 4 5 6 8 9 10 12 Angle Spacing Degrees 120 90 72 60 45 40 36 30 Accuracy Grade Reference 0 Calibration 1 Diameter Across Corners Height Inch (mm) Inch (mm) Target Size Inch (mm) 2.90 (73.6mm) 75 x .75 (19 x 19mm) .880 (22.3mm) Target Area Flatness* Accuracy of Calibration (Uncertainty) 4 µin. (.10 µm) ±1.0 sec. Area Area Sq. In. Sq. Cm. .56 3.60 Maximum Deviation of Faces from Nominal 3-12 ±1.0 sec. ±2.0 sec. *Excludes .020 (0.5mm) from edges. ALL SIZES: Flatness and parallelism – top and bottom –.00005; maximum pyramidal error ±15 seconds. To order, specify the following information: (1) The number and position of all finished sides, including the base: NOTE: for fixturing purposes during manufacturing, the bottom face must be one of the finished sides. The bottom face is etched with the Webber logo, a serial number, and face identifications as applicable. Example #1: 4 sides: Top, front, Left, and Base. Example #2: 3 sides: Front, Right, an Base. (2) Specify the manufacturing tolerances of the 90° angles, 1 second, 3 seconds, or other angular specification. NOTE: Our uncertainty of measurement is estimated to be ±1.0 seconds. This uncertainty should be added to the manufacturing tolerance to give pratical tolerance of the cube. (3) Specify if a Certificate of calibration is needed, at extra cost. NOTE: Other sized cubes up to 2-inches are available on special order. Through holes, etched reticules, or threaded holes into stainless steel inserts may also be specified at extra cost. 476 STARRETT-WEBBER GAGE BLOCKS Gage Block Stones If a block does not wring together with other blocks, it may be the result of nicks or other damage. Examine blocks carefully with a magnifying glass. If a small burr is found, it may be removed with a gage block stone. Starrett-Webber stones, when used moderately, may be rubbed directly on the gaging surfaces without danger of decreasing the size of the gage block. Available in 3 styles/materials as listed. GS 13 is recommended for use with steel gage blocks SAO 13 is recommended for general use. Steel, ceramic, or carbide blocks SAO 23 is recommended for use with carbide and ceramic gage blocks For Block Material Steel Steel or Carbide Chamois These Starrett-Webber synthetic chamois cloths, rather than natural chamois, are recommended for wiping gage surfaces. They can be used with solvents and oils, including Starrett M-1® All-Purpose Lubricant, and are washable in detergents. Description Dry Lubricated 478 Catalog No. CH 1. CH 2. Description Black Granite Stone, 1/4 x 1 x 3⬙ (6.3 x 25 x 75mm) Sintered Aluminum Oxide, 5/16 x 1 x 3⬙ (8 x 25 x 75mm) Serrated Aluminum Oxide With Case, 1 x 2 x 3⬙ (25 x 50 x 75mm) Catalog No. GS 13. SAO 13. SAO 23. STARRETT-WEBBER GAGE BLOCKS Accredited Gage Block Calibration Service In accordance with: ISO 17025 ANSI/NCSL Z540-1 ISO 10012-1 former MIL-STD-45662A Master Grade Calibration Commercial Grade Calibration The calibration procedure is regarded as a process to be controlled and monitored using SPC techniques. Information that would enable the analysis of control data is to be recorded and made available to the user upon request (at extra cost). A second master, sometimes referred to as a control block, is used in the calibration. The purpose of the second master is to generate known difference readings which can be plotted and analyzed. The average of the known differences of several readings of the two masters and the range of their differences can be analyzed using statistical techniques. The calibration process can be demonstrably controlled. Calibrations are performed using the same program as our Master Grade calibrations except that the second master, the control block, is omitted. By omitting this control block some of the statistical tests are also omitted which results in larger uncertainty. Our Reference Gage Blocks are calibrated directly by the National Institute of Standards and Technology. All other Reference Standards are periodically checked and calibrated either by NIST or NVLAP accredited laboratories. Documented histories are maintained. Statistical methods are used to control the master gages. All necessary information required to confirm the calibration and calculations is captured. All raw data from the comparator, the temperature of the blocks, the temperature of the comparator, and the relative humidity of the surrounding environment is recorded for each measurement. Applied correction factors are to be broken down and recorded as well as the results of any calculations. The measurement uncertainty is individually computed for each size. Reported measurement uncertainties based upon a 95% confidence level (two standard deviations) are dynamic, reflecting the current performance of the specific equipment and operator. Other factors included in the stated uncertainty are derived from a detailed error analysis. The error analysis is based upon experimentation whenever possible or industry consensus from estimates derived from NIST publications. Experimental checks of the stated uncertainty levels are made using laboratory comparison techniques involving both internal repeatability studies and external comparisons with other calibration laboratories. The checks and balances under the Master Grade guidelines require considerably more time and effort than the Commercial Grade Calibrations. The entire process is under constant review and testing. NOTICE: Webber Gage cannot recommend recalibration due dates on our calibration certificates or calibration stickers. Recalibration due dates must be provided to us at the time of order. If this information is not provided, the recalibration due date will be left blank for the user to add. All necessary information to confirm the calibration is recorded. All raw data from the comparator, the temperature of the blocks, the temperature of the comparator, and the relative humidity of the surrounding environment is recorded for each measurement. Applied correction factors are broken down and are recorded, as well as the results of any calibrations. Our Reference Gage Blocks are calibrated directly by the National Institute of Standards and Technology. All other reference standards are calibrated either by NIST or NVLAP accredited laboratories. Documented histories are maintained of our measuring and test equipment. Statistical methods are used to control our Master Gage Blocks. Reported uncertainties are based on a 95% confidence level. Experimental checks of the uncertainty are made using laboratory comparison techniques involving repeatability studies and external comparisons with other calibration laboratories. Approximate Best Uncertainty Values for blocks up through 4⬙ (100mm) in length Master Grade Commercial Grade Grade Uncertainty Minimum Uncertainty Minimum 0.65 + 0.7L 1.4 µin. Webber LM not available .016 + .0007L .035 µm 1.2 + 0.7L 1.7 µin. 1.6 + 1.0L 2.4 µin. B89.1.9 00 .03 + .0007L .045 µm .04 + .001L .060 µm 1.8 + 0.7L 2.0 µin. 2.0 + 1.0L 3.0 µin. B89.1.9 0 .045 + .0007L .050 µm .05 + .001L .075 µm 2.0 + 0.7L 2.0 µin. 2.0 + 1.0L 3.0 µin. B89.1.9 AS1 .05 + .0007L .050 µm .05 + .001L .075 µm NVLAP® accreditation does not constitute an endorsement of any product by NVLAP or any agency of the U.S. Government. 479 STARRETT-WEBBER GAGE BLOCKS Gage Block Recalibration Service Our calibration service catches worn gage blocks before trouble starts … eliminating costly production inaccuracies. Be sure to have your gage blocks checked regularly. Starrett-Webber Gage Division offers all gage block users a complete calibration service as insurance against production inaccuracies. 4. Any brand of used rectangular, square or heavy-duty gage blocks will be calibrated and the deviation from the marked size of each block will be shown on the Certificate of Calibration. All linear measurements are based on the new International Inch or Meter. 5. For obvious reasons, Starrett-Webber does not calibrate new gage blocks of other brands. 6. are longer wearing and more stable than steel masters. StarrettWebber Grand Master Gage Blocks are calibrated directly by the U.S. National Institute of Standards and Technology (NIST). A computer automatically processes the Certificate of Calibration to insure complete accuracy in recording gage block size. This certificate shows the deviation from the marked size of each block and marks those sizes which need replacing. A quotation is then prepared showing the costs of any recommended replacements in the original material and croblox®, if applicable. If no replacements are required, or if you have issued instructions to only calibrate and return the set, the gages are packed and returned to you with a Certificate of Calibration showing the “as found” readings. If you authorize the replacements, your Certificate of Calibration is marked to indicate which blocks were replaced and the date of replacement. However, if you wish, an “as found” and an “as left” certificate can be made at extra cost. This gage block calibration service is done promptly, and blocks are ready to be returned to you within a few days after their receipt by Starrett-Webber. 7. 1. After your gage block set arrives in the Starrett-Webber receiving room, it is given a receiving number and each block is cleaned to remove oil, grease and film. The case is also thoroughly cleaned. 2. Next, each block is lightly stoned to remove small nicks and burrs. This does not guarantee that the blocks will wring if they are heavily nicked, scratched, or burred. 3. Your gage blocks are then individually compared with master blocks which are accurate to fractions of one millionth of an International Inch. Starrett-Webber Grand Master Blocks are Starrett-Webber croblox® (solid chrome carbide) and therefore Calibration Service When sending gage blocks to Starrett-Webber Gage Division for calibration, please specify whether we are to (A) calibrate, issue certificate and return only; (B) Calibrate, advise condition and hold for instructions; or (C) Calibrate, replace worn and missing blocks, and return. If order specifies that worn and missing blocks should be replaced, and the cost of replacement approaches that of a new set, we will inform you, quote prices and wait for instructions. Shipping Damage is Costly and Inconvenient Please Protect Your Valuable Gage Blocks by Proper Packaging Remember, gage block cases are made for immobile storage – not as shipping crates. Follow these steps when preparing your gage blocks for shipment: 1. Gage blocks should be treated with rust preventative such as Starrett M-1® Lubricant. 2. Place waxpaper over the blocks. 3. If necessary, place Kimpak or similar cushioning inside lid to prevent jiggling of blocks in the inserts. Do not force lid closed. 4. Seal the closed case with nylon or fiberglass reinforced heavy tape. The clasp will not hold in shipping nor will paper tape. 5. Use a strong outer shipping container large enough to allow sufficient, firm cushioning material to withstand shock in transit. 6. Mark outer carton plainly, “DELICATE INSTRUMENTS – FRAGILE”. LABEL “DELICATE INSTRUMENT FRAGILE” CUSHIONING MATERIAL CORRUGATED BOX NYLON TAPE Example of a set damaged in transit due to improper packaging. 480